Boiler uptake



Nov.A 19, 1929. T. B. s'nLLMAN BOILER UPTAKE Filed April 3. 1928 2 sheets-sheet 2 NN l INVENTOR Patented Nov. 19, v1929 UNITED STATES PAfri-:BrrHq:EA

THOMAS B. SKTILLMAN, OF SOUTH ORANGE, NEW JERSEY, ASSIGNOR TOiTI-IE BABCOCK @c WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A CORIOIELA'lION` GENEVV'k JERSEY' BOILER UPTAKE Y Application filed April 3,

This invention relates to an installation of marine boilers that operate in boiler rooms that are maintained at super-atmospheric pressure to produce Vforced draft,v and will be understood from the description in connection with the accompanying drawings, in which Fig. l is an end view in section and somewhat diagrammatic, showing an illustra-l tive embodiment of the invention, and Fig. 2 is a section along the line2-2 of Fig. l.

In the drawings, reference character l indicates the hull of a ship and the sea level is indicated at 2. The ship is provided with an air-tight boiler room 3 that is maintained at super-atmospheric pressure by means of the air pressure' fan 4, so that forced draft is thereby maintained through the boiler furnaces.

It has been found that in-some present installations of this character in which closed forced draft fire-rooms are used, gas sometimes escapes from the uptake or smoke-stack leading away from the boilers or fire-room into theliving quarters of the ship. This seeping or leaking of the gas is caused by the fact that the gas leaving the boilers through the uptakes and stacks is somewhat above atmospheric pressure and, therefore, leakage takes place unless the uptakes and stacks are absolutely tight. It is expensive to make the uptakes absolutely tight, and the present invention obviates the objectionabove referred to in a very simple and inexpensive manner. The invention is illustrated with a ship with two boilers located side byside in the fireroom, but the invention is also applicable Vto any other number of boilers. The boilers as illustrated each have anupper or steam and water drum 5 and lower drums 6 connected by banks of tubes inthe well-known manner in boilers of this type. The furnaces of the boilers are indicated at 7 and uptakes 8 for waste products of combustion lead from the upper portions ofthe boiler to a stack or iiue 9 that leads to an outlet 10 on the side of the shi 'lPhe stack or flue 9 is surrounded by an outer casing l1 that isair-tight and is spaced from the stack or flue so as to leave a space, as indicated at 12. The end of the casing 11 is 192s.. seriai No. 266,934. l y

closed,as indicated at 13, and thespace V12 between the casing lla'nd the flue 9 communicates'with the boiler room, as indicatedat k14. rThe invention is applicable either to a inclined flue or stack f naturaldraft, and it is sometimes true even with ships that are equipped withrelatively vertical uptakes and stacks to produce a fairly strong'v natura-l draft'. The air pressure in the boiler room'3 causes air topas's through ,the openings 14 into the space l2' around the flue 9, 'thus preventing any gas from escapf ing through cracks or leaks that may bein theflue. In. view'of thefact that the end of the space 12 is closed, as; indicated at '13, this does notcause waste of air, except the small amount ofair that may pass directlytinto the flue'9 from the space l2 to preventleakage 7 of gas in the other direction. Either the Vflue 9.orfthe casing l1 may beinsulated with lheating insulating material, if desired.

I claim: i

A ship having a boilerroomin which v'superv-atmo'spheric pressure is'v maintained, a smoke-stack extending from the boilers in said room'to the outside, ,mean's comprising a vcasing spaced from said` stack 'to'prevent leakage of gases from said stack, andl means to maintain boiler room pressure in the space between said stack and casing.

2. A ship having a boiler room in which super-atmospheric,pressure is maintained, a smoke-stack extending from the lboilers in said room to the outside, and a casing surrounding said stack preventing leakage from said stack, the inside ofsaid'casing being subjected to boiler room pressure.

3. A ship having a boiler room in which ico " super-atmosphere pressure is maintained, a

smoke-stack 'extending from' thev boilers in said room to the outside, a easing surrounding said stack preventing leakage from said astaek, said casing being spaced from said stack, and ineans to vmaintain super-atmos pheriopressurefintliespace betweensthe staek and easing.

4. A ship having a boiler room in which super-atmospheric pressure is maintained, ai

from the boilers 4in i,

smoke-stack extending said room to the outside, a casing surrounding said stack preventing leakage froinsfaid stack, said casing being spaced from said stack, and means to maintain substantially ythe same pressurein thespaoe between said stack and oasingasin saidboiler room.

5,; A; ship having a boiler room` invvhich super-atmospherie4 pressureV is maintained', a smoke-stack extending "from the boilers iii said room to the side of said ship, and.: a oaS ing surrounding said stack preventingleakage from said stack, lthe inside of said oasingbeing subjected' torboiler room pressure.

6. A ship having a boilerroom in `which superatinospherie pressure is maintained,;a

smoke-stack extending from tbel boilersiii said room `to the outside, andan air-tightcas-l ing; suroundinggsaidV stack, the inside offsaid casing being su-bjfeotedfv to boiler room: pres-` sure` f f--f l 7.., A ship havingl a boilerroom iii which superatmospheric pressure is niaintained,.f a smoke-stack l the said room to ,theD outside, a. casing sur.- rounding: said L stack Where itQpas'sestlirougli theiquartersof-the',ship abovetlie fire-room,

n saidfcasinfgi; beingspaeedffrom saidstack and y means tol pressure between thesaidl stack and'cfasingas maintain substantiallyulthe saine in -said .boilerfroom `topreventleakageof gases romsaid stack intovtheA quartersof the ship above theboiler room., Y. 8*. A ship` having a boiler-roomvin which super@atmospherio-V pressure is maintained, a smoke-staekfextending from `said boiler room Y to the;- outside@v aY casing surrounding: said Cil stack preventing 'leakage from said stack, said casing "being spaeed'from said, stack, and;` the space betweenthe -staek and casi-ng being connected by. means 'of lop enings to vthe looilerfToornsol that the superi-atmospherie pressure existinglin `tlie boiler room Willb earriedjto .,everyz. portion of v-thespaee` between the staek and Casing si'irroundingVY said ,stak.

eXtending` i'rom\ the boilersinV 

